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This article will explain in detail how to restore the Oracle Delete table, the content of the article is of high quality, so the editor will share it for you as a reference. I hope you will have a certain understanding of the relevant knowledge after reading this article.

Oracle Delete recovery (ODU)

The data in the table is DELETE

(1) set the parameter unload_deleted to YES

(2) generate data dictionary: unload dict

(3) recovery table: unload table username.tablename

-Simulation erroneous deletion

Create table t0 as select * from dba_objects

Create table t0_bak as select * from t0

Select count (*) from t0;-86159

Delete t0 where object_id > 85000; commit

Select count (*) from t0;-84141

One: set the parameter unload_deleted to YES

Second: generate a data dictionary

Three: restore the table

Rename t0 to tt0

CREATE TABLE "CHEN". "T0"

(

"OWNER" VARCHAR2 (30)

"OBJECT_NAME" VARCHAR2

"SUBOBJECT_NAME" VARCHAR2 (30)

"OBJECT_ID" NUMBER

"DATA_OBJECT_ID" NUMBER

"OBJECT_TYPE" VARCHAR2 (19)

"CREATED" DATE

"LAST_DDL_TIME" DATE

"TIMESTAMP" VARCHAR2 (19)

"STATUS" VARCHAR2 (7)

"TEMPORARY" VARCHAR2 (1)

"GENERATED" VARCHAR2 (1)

"SECONDARY" VARCHAR2 (1)

"NAMESPACE" NUMBER

"EDITION_NAME" VARCHAR2 (30)

);

Four: load the data into the database through sqlldr

5: validate data

Select count (*) from t0;-86159

Select * from t0 where object_id > 85000

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